b'16 mmThe 16 mm is Harkens smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The bearing system uses stainless steel balls in a captive grooved race and has a 113 kg (250 lb) maximum working loadthe highest on the market compared to similarly sized blocks.The 442 uses a spacer and the 404/404HL uses an O-ring to keep the line in the sheave during intermittent loading.The 467 and 484 use a narrow sheave for extremely small control lines and have a ferrule head for soft attachments. They use the same high load ball system. The 484 features a bronze sheave for added durability.Use for:Dinghy control linesSpinnaker pole trip lines Hardened stainless steel inner race Big boat leech linesOuthauls for maximum strength-to-weight ratio.DownhaulsCunninghamsTraveler controlsHalyards on pramsCutout11 mm (7/16") x 41 mm (1 5/8") 39160.3 mm 376(2 3/8") 404 405404HL368 Actual size408 409406 407 36 mm(1 7/16") 416416HLCutout11 mm (7/16") x 35 mm (1 3/8") 41744.5 mm(1 3/4")437 442467421 432 12.7 mm(1/2") 27 mm(1 1/16")Sheave Max line Maximum BreakingPartLength Weightworking load loadNo. Description in mm in mm oz g in mm lb kg lb kg368In-line exit*5/816376 947/3252501131200544 . 27 376Forkhead5/8161 1/829 387/3252501131200544 . 11 391Hook-in halyard5/8161 5/8 5137/325250113400181 41.404Single**5/8161 1/829.33107/3252501131200544404HL Single/high-load 5/8161 1/829 33105500 226 1200544 . 7/32 405Single/becket5/8161 1/238.44127/3252501131200544Double5/8161 11/1643.94277/3254502041200544 406 407Double/becket5/8162 1/8541287/3254502041200544408Triple161 13/16461.44417/3253181200544 5/8700 16571.5435 409Triple/becket5/82 1/47/327003181200544 416Cheek*5/8161 13/1646.447/3252501131200544 12 416HL Cheek/high-load 5/8161 13/1646 445500 226 1200544 . 127/32 417Single/swivel***5/8161 13/1646.63187/325250113750339421Through-deck*5/8162 3/860.63187/3252501131200544 432Pivot cheek*5/8161 3/835.38117/325250113750339 437Flip-flop*5/8161 5/16.75217/3252501131200544 34 442Block/eyestrap assembly*5/8161 3/835.44127/3252501131200544467Narrow ferrule head5/8161 15/3237 44125/324250113750339 .*4 mm (#8) RH fasteners.**Contact Harken for replacement O-rings HSB340. ***Shackle pin diameter 4 mm (5/32").33'